Font Settings

Changing the font can be done via adding these lines to the right-hand pane of Preferences ▸ Settings:

"font_face": "Courier New",
"font_size": 10

and then change as desired. The font will change when you save.

You can see other settings to change by browsing through the left-hand pane of Preferences ▸ Settings. There are many things that can be customized in Sublime Text.